Hi Today was the second time when my Zope has hanged up. The same thing has happened 6 days ago. I've never got problems with stability since I have moved from Zope 2.6.1 back to 2.6.0. This was caused by experiencing a bug described in Collector (Issue 852). Here is some background: I run Zope 2.6.0 on Windows 2000 server. Products installed are: - CCSQLMethods - DCOracle2 (1.3 beta) - ZODBCADA - exUserFolder (0-10-10) My application works with Oracle 8i database and has about 150 users. There is no Apache in front of Zope yet. Why it hangs? I have checked event log and the last thing logged in before hang up was: - first hang up: 2003-07-11T17:44:22 INFO(0) ZODB conflict error at /cr/centralne/blokowanieDokumentow/blok/LFaktur (186 conflicts since startup at 2003-07-09T23:04:31) - and the second one: 2003-07-17T08:15:16 INFO(0) ZODB conflict error at /cr/centralne/rozliczeniaBezgotowkowe/dokumentDyspozycji/ przegladPozycji/wyborFaktur/listaFakturS/zapiszZmiany (663 conflicts since startup at 2003-07-14T08:19:55) ...iteration over the number of conflicts... 2003-07-17T08:25:17 INFO(0) ZODB conflict error at /cr/centralne/rozliczeniaBezgotowkowe/dokumentDyspozycji/ przegladPozycji/wyborFaktur/listaFakturS (669 conflicts since startup at 2003-07-14T08:19:55) The next logged thing in were standard messages of zope startup. Is it possible that conflict errors killed my zope? I think about patching my Zope installation with Dieter Maurer's ReadConflictError patch, but I'm neither sure this will help nor this will work with 2.6.0. Any ideas? Jakub